6.30 "Calculation for SFC" dialog box in SFV
Overview
Calculations can be configured in steps, transitions or sequencers in the SFC Editor.
Configuring is carried out in the "Calculation for SFC" dialog box of the SFC Editor. You can
find more information on configuring calculations in the section "Overview of SFC calculations"
of the
SFC for SIMATIC S7
manual or online help.
The current values of the function inputs and calculation results for the calculations configured
in this "Calculation for SFC" dialog box can be displayed in SFV.
The structure is similar to the test mode of the dialog box in SFC, but the "Data Type" column
is missing and no fields can be edited.
Opening the dialog box in SFV
The dialog box is opened with the "f(x)" button in the following properties dialog boxes:
● Properties of steps
● Properties of transitions
● Properties of sequencers (menu command "Edit > Sequencer Properties")
Note on automatic closing of the dialog box
The "Calculation for SFC" dialog box is always linked with the higher-level properties dialog
box of the step or transition from which it was opened. If this link is broken due to operator
inputs by the user, the calculation dialog box will close.
Examples of operator inputs that cause the dialog box to close:
● Closing the higher-level properties dialog box.
● Changing the page in the higher-level properties dialog box of the transition
● A change of step, transition or sequencer in the SFC Editor
Value display in the "Value" column
● The current value is displayed and cyclically updated in the "Value" column:
– For the overall result of the calculation
– For all function inputs with interconnection to addresses
– For intermediate results, that is, function inputs with interconnection to lower-level
functions.
● If the OS does not supply a value to SFC Visualization for an address, e.g., in case of
broken connection, the text "##OFFLINE##" is displayed in the corresponding line of the
"Value" column.
Operator inputs in the dialog box
Operating and monitoring SFCs
6.30 "Calculation for SFC" dialog box in SFV
SFC Visualization (V9.0)
76 Programming and Operating Manual, 05/2017, A5E41356392-AA
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